* {
  box-sizing: border-box;
}
body {
  background-color: black;
  transition: background-color 1000ms linear;
}
canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
footer {
  position: absolute;
  height: 50px;
  left: 0;
  bottom: 0;
  width: 100%;
  text-align: right;
  padding: 10px;
  color: grey;
  font-family: Consolas, Menlo, Monaco, Lucida Console, Liberation Mono,
    DejaVu Sans Mono, Bitstream Vera Sans Mono, Courier New, monospace, serif;
}